This question already has an answer here:
all. I have encounter the problem for some days, this is the detail stack information:
org.springframework.dao.RecoverableDataAccessException:
### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
### The error may involve com.tuan800.searchtask.model.dao.mybatis.RelationDao.updateSuggest-Inline
### The error occurred while setting parameters
### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
; SQL []; Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:98)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:71)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:346)
at $Proxy10.update(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:245)
at com.tuan800.searchtask.model.dao.mybatis.impl.RelationDaoImpl.updateSuggest(RelationDaoImpl.java:24)
at com.tuan800.searchtask.service.impl.RelationServiceImpl.modifyRelationCount(RelationServiceImpl.java:64)
at com.tuan800.searchtask.RelationIndexTask.main(RelationIndexTask.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:115)
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 18,940 milliseconds ago. The last packet sent successfully to the server was 18,918 milliseconds ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1118)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3055)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2941)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3489)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2113)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1364)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.execute(NewProxyPreparedStatement.java:989)
at sun.reflect.GeneratedMethodAccessor163.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:45)
at $Proxy20.execute(Unknown Source)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:22)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:51)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:29)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:88)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:121)
at sun.reflect.GeneratedMethodAccessor165.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:338)
... 10 more
Caused by: java.net.SocketException: Software caused connection abort: recv failed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:129)
at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2499)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2952)
... 32 more
I want update a record in mysql by mybatis and spring,and I update it one by one,below is mybatis config: update suggestions set count = #{count},version=#{version},freq=#{freq} where id = #{id}
And the service code:
for(RelationBvo relation : list){
Long totalCount = solrDealService.queryResult(relation.getWord(),null,null,0);
relation.setCount(totalCount.intValue());
if(relation.getFreq() == 0){
relation.setFreq(1);
}
***relationDao.updateSuggest(relation);//update record***
executedCount++;
logger.info("Program have executed "+executedCount+" records.");
}
can anyone help me?thanks very much.
srini.venigalla
Your mySQL connections are timing out before your connection pool recognizes them. There are multiple ways to fix this:
- Increase the timeout value in mysql config file (my.ini)
- Reduce the idle time in your connection pool, so that it will discard the connection before mysql will close it
- Add a validate connection query in your pool config so that the pool tests each connection before it gives it to you, but this can slow down the system terribly.
来源：https://stackoverflow.com/questions/9527459/com-mysql-jdbc-exceptions-jdbc4-communicationsexception-communications-link-fai